Bicomponent fibers, textile sheets and use thereof

a technology of fibers and fibers, applied in the field of fibers of coresheath type, can solve the problems of narrow bonding temperature window of pla fibers, material decomposition to carbon dioxide, and often not optimal products in other aspects, and achieve the effect of improving the biodegradability of said polyolefin

Inactive Publication Date: 2011-02-03
FIBERWEB COROVIN GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]It is still another object of this invention to provide fibers which can be produced on conventional spinning equipment using process parameters already in use in the manufacture of polyolefin fibers.
[0016]In one embodiment this invention relates to a bicomponent fiber comprising aliphatic polyester or a mixture of aliphatic polyesters as a first component, and comprising a polyolefin or a mixture of polyolefins as a second component and comprising in the second component an effective amount of an adjuvant which improves the biodegradability of said polyolefin.

Problems solved by technology

While known products already can satisfy requirements of biodegradability these products often are not optimal in other aspects.
Nonwovens made of polyolefins can avoid these shortcomings but they are derived from oil and gas and not from renewable primary products.
Due to the biodegradation process, such materials will completely decompose to carbon dioxide, water and biomass.
However, some weaknesses can be seen: The bonding temperature window of the PLA fibers is narrow.
Additionally, a high shrinkage of the PLA nonwovens has to be considered.
Unfortunately, the advantages of the nonwovens made of bicofilament with biodegradable plastic in the core and polyolefin in the sheath are combined with a loss of the biodegradability or compostability.
Consequently, a degradation process is inhibited or at least impeded.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0070]A nonwoven was produced by melt spinning bicomponent fibers with core-sheath configuration and by forming a spunbond with a basis weight of 15 g / m2 in a pilot plant. The weight of the core being 75% and the weight of the sheath being 25%. The core was made of PLA and the sheath was made of polypropylene. The core contained 10% by weight, referring to the weight of the core, of a Calcium carbonate (Omyalene 102M). The sheath contained 3% by weight, referring to the weight of the sheath, of a biodegradation promoting adjuvant (Addiflex HE).

example 2

[0071]The procedure of Example 1 was followed but a spunbond of basis weight of 26 g / m2 was produced.

[0072]In the following table details of the spunbonds prepared in the Comparative Examples 1-4 and in the Examples 1-2 are summarized.

Core-Sheath-BasisCore-Additive1)SheathAdditive2)WeightExampleMaterial(% b.wt.)Material(% b.wt.)g / m2C1PLA—PP—15C2PLA—PP—26C3PLACa-CarbonatePP—15(10)C4PLACa-CarbonatePP—26(10)1PLACa-CarbonatePPDegradation15(10)promoter (3)2PLACa-CarbonatePPdegradation26(10)promoter (3)1)Omyalene 102M (Omya)2)Addiflex HE (Add-X)

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Abstract

Disclosed are bicomponent fibers with aliphatic polyester forming a first component and a polyolefin forming a second component wherein the polyolefin contains an adjuvant improving the biodegradability of said polyolefin. Textile sheets comprising these bicomponent fibers are comparable in their mechanical properties to polyolefin based textile sheets while these are more efficiently decomposed by the action of microorganisms as polyolefin based textile sheets.

Description

CLAIM FOR PRIORITY[0001]This application is a national phase entry of International Application No. PCT / EP2008 / 001109, filed Feb. 14, 2008, entitled “Bicomponent Fibers, Textile Sheets and Use Thereof”. The priority of International Application No. PCT / EP2008 / 001109 is hereby claimed and its disclosure incorporated herein by reference in its entirety.FIELD OF THE INVENTION[0002]This application relates to bicomponent fibers of core-sheath type with improved biodegradability. Textile sheets comprising these fibers can be used in different fields of applications, such a textile applications or as industrial applications. Preferably, textile sheets are prepared as nonwovens, which can be used in personal care articles.BACKGROUND OF THE INVENTION[0003]Biodegradable fibers and textile sheets made therefrom are known. One approach for improving biodegradability is the use of polymers which are known to show an improved biodegradation behavior as compared with, for example, polyolefins. An...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H3/16D02G3/04D04H13/00A01C1/04D04H3/011D04H3/147D04H3/153
CPCD01F1/10Y10T428/2929D01F8/14D01F8/06Y10T442/681Y10T442/697
Inventor CHESTER, STEPHEN O.BORNEMANN, STEFFEN
Owner FIBERWEB COROVIN GMBH
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